When it comes to looking for some sort of a souvenir for an event, there are a variety of different elements that you can have to give the people who participate. A common item is to have custom made t shirts to give to people who take part. For instance, if it is a fundraiser walk, it is a good idea to give everyone a t-shirt so those who are driving by realize there is an event going on. Typically there is a minimum amount required to enter so that should easily cover the cost of the shirt. With that said, there are many other items that you can have custom printed such as water bottles, cell phone holders, stickers, temporary tattoos or anything else that you can think of. Your printer can tell you what they find works best.